Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4567b53be9d7b5…

MALICIOUS

PDF

44.5 KB Created: 2021-05-14 01:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 16a5e03dacfce34ec822a69742be2c0d SHA-1: 2c55961a6e53b76326b855ca0e902167729a3e39 SHA-256: ea4567b53be9d7b585c1c882c3231974e70a75f59ba7ecbc2369ea6c16b7cbef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as game hacks and free in-game currency generators. The ML classifier and specific PDF heuristics strongly indicate malicious intent. The embedded URLs likely lead to further malicious content or phishing pages, serving as a lure for users seeking cheats or free items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/479516143/minecraft-tools-game-hack In PDF document text
    • http://uptodate.az/images/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://education.minecraftIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a7e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7E 25028 bytes
SHA-256: ddbd1e26ae495190ce985655d26f4f4e3f17073ccd27b16ac8537982a8f7bf39
font_01_sfnt_off00008313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8313 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFE 17784 bytes
SHA-256: 2a833d33c5ebf10caee2e4c1b445a2173c9d4c016a2b5c4a8254ba70d54254b8

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